calculating voltage

ohms law

Ohms law ca be expressed as an algebric equation: E=IxR
"E" = electromotive force (voltage)
"I" = intenstiy (amperage)
"R" = Resisance (ohms) there is an equation to see the various relationships between amps vlots and ohms.

if you know the voltage and the resistance you can figure out the load on the given circuit.
say like like converting from a 6 volt system to a 12 volt system and you want to know the proper wire size for the headlites. for headlites you use watts instead of volts in the formula to find the resistance and go from there.

the formula:
volts = amps x ohms

and or amps= volts/ohms and or ohms= volts/amps

or E --- I|R

ohms law and power(watts)

watts is = to volts x amps

(ie) 6 volts x 20 amps =120 watts 12 volts x 20 amps =240 watts

what you need to determine is how many watts the lights are, then divide by 12 and that will equall the amps needed to run the lights.

the size of wire you need will determine the amps that can flow through the wire. I think a 14 gauge wire can handle 20 amps of current.

hope this helps,

dave

Power is the name we give to the rate of work done by any sort of machine. power consumption is expressed in watts. one tid bit of info
746 watts = 1 hp
an eletric motor can be figured this way.

the first solving circle is E
----- -- I | R

second p= power or watts is

P
----- --- I | E

or P=IxE

to be honest I dug the info out of a book that I havent looked since college over 10 years ago yes yes I am not old. lol.